Process and apparatus for production of useful iron product...

Details Process and apparatus for production of useful iron product... Process and apparatus for production of useful iron product...

C - Chemistry, Metallurgy

22

B

C22B 7/00 (2006.01) C21B 11/00 (2006.01) C21B 13/00 (2006.01) C21B 13/14 (2006.01) C22B 1/02 (2006.01) C22B 1/24 (2006.01) C22B 3/02 (2006.01) C22B 7/02 (2006.01)

Patent

CA 2259325

A method and apparatus for producing a more concentrated iron product from an industrial waste materials stream (10) comprising iron and non-iron constituents such as EAF dust generally including the steps of compacting (60 A) the waste materials stream, roasting (14 B) the waste materials stream separating (600) the iron compounds contained in the waste materials stream by magnetic separation or flotation, and providing the iron compounds back to the EAF is described.

Méthode et appareil de récupération de produits à concentration plus élevée en fer à partir d'un jet de déchets industriels constitué d'un mélange d'éléments ferreux et non ferreux, tels les poussières EAF et les poussières de convertisseur basique. La méthode comporte généralement les phases suivantes : compactage ou briquetage du jet de déchets industriels, grillage du jet de déchets industriels à des températures supérieures à 980 ·C pour convertir les éléments ferreux en fer de réduction directe, concassage du jet de déchets industriels, séparation des éléments ferreux contenus dans le jet de déchets industriels par séparation magnétique ou flottation et restitution des éléments ferreux à l'EAF ou au convertisseur basique.

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